[time-nuts] HP 5071A Electron Multiplier of Cesium Beam Tube

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Sep 6 17:40:27 UTC 2009

In message <a1816d2c8e3e1a65e67636c1a08cf08a.squirrel at webmail.sonic.net>, "Rick
 Karlquist" writes:
>J. Forster wrote:
>> Cesium is pretty reactive and could likely be stripped off chemically and
>> the CBT tube cleaned.
>The HP/Agilent CBT experts claimed they didn't know how to do this, at least
>for any economically viable cost.  They also said they have been
>asked this question approximately 2 gazillion times.

The problem is not inactivating the cesium, that happens when pretty much
any gas enteres the tube.  The problem is getting the resulting chemical
compounds cleaned out.  Cs salts are not very soluble in pretty much

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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Never attribute to malice what can adequately be explained by incompetence.

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